<table width="392" height="101" border="1" align="center" caeelpdding="1" cellspacing="1" bordercolor="#009900" bgcolor="#ccff00">
	<tr>
		<td height="25" colspan="2" align="center" class="STYLE5">
			判断指定年份是否为闰年？
		</td>
	</tr>
	<tr>
		<td width="160" height="30" bgcolor="#ffff99">
			<span>
				请输入一个四位数的年份：
			</span>
		</td>
		<td>
			<form action="" method="post" name="form1">
				<table width="196" height="29" border="0" cellpadding="0" cellspacing="0">
					<tr>
						<td width="136">
							<input name="txt_year" type="text" value="" size="20">
						</td>
						<td width="60">&nbsp
							<input type="submit" name="Button" value="计算">
						</td>
					</tr>
				</table>
			</form>
		</td>
	</tr>
</table>